film rewind knob
/ˈfɪlm ɹɪwˈaɪnd ˈnɒb/
n
English · film rewind knob中文 · 倒片旋钮Español · botón de rebobinado de la películaFrançais · rebobinage
意味：Control knob for rewinding a totally or partially exposed film back into its cartridge.